Yes, air-dry clay can be sealed with clear varnish. Clear varnish will help protect the clay from moisture and give it a glossy finish. It is important to make sure that the clay is completely dry before applying the varnish to prevent any cracking or warping. Additionally, it is recommended to apply the varnish in thin, even coats to ensure a smooth and even finish. **

In air-conditioned rooms, people may clear their throat more frequently due to the dryness of the air. Air conditioning can remove moisture from the air, leading to dry throat and irritation, which may prompt individuals to clear their throat more often. However, the frequency of throat clearing in air-conditioned rooms can vary depending on the individual's sensitivity to dry air and other factors such as allergies or respiratory conditions. Overall, it is not uncommon for people to clear their throat more frequently in air-conditioned rooms compared to more humid environments. **

History is never clear-cut because it is shaped by multiple perspectives, biases, and interpretations. Different individuals and groups have their own versions of events, and these can be influenced by cultural, political, and social factors. Additionally, historical evidence is often incomplete or open to interpretation, leading to differing conclusions about the same events. As a result, history is constantly being reevaluated and revised as new information and perspectives come to light. **

If you are considering wearing hiking shoes instead of air shoes, it's important to consider the specific needs of your activity. Hiking shoes are designed to provide support, stability, and traction on uneven terrain, making them a better choice for outdoor activities such as hiking, trekking, or trail running. On the other hand, air shoes are designed for indoor or urban activities and may not provide the same level of protection and support needed for outdoor adventures. Therefore, if you are planning to engage in outdoor activities, it's recommended to opt for hiking shoes for better performance and safety. **

To clear your browsing history, you can typically do so by accessing the settings or options menu in your web browser. Look for a section related to privacy or browsing data, where you should find the option to clear your history. You can usually choose to clear your entire browsing history or just specific items such as cookies or cached images and files. Once you've made your selections, follow the prompts to confirm and complete the process. Keep in mind that the exact steps may vary slightly depending on the web browser you are using. **

To clear the chat history on WhatsApp, you can open the chat you want to clear, tap on the three dots in the top right corner, and select "Clear chat." You will then have the option to clear the chat history for that specific chat or delete all chats. Keep in mind that clearing the chat history will only remove the messages from your device, and the other person will still have a copy of the conversation. **

The air becomes thinner in the mountains because as altitude increases, the atmospheric pressure decreases. This means that there are fewer air molecules per unit volume at higher altitudes, resulting in lower air density. As a result, there is less oxygen available for breathing at higher elevations, making it more difficult for humans and animals to breathe and for combustion to occur. This is why people often experience shortness of breath and fatigue when they first arrive at high altitudes. **

To clear the history on a MacBook, you can go to the Safari browser and click on the "History" tab in the menu bar. From there, you can select "Clear History" and choose the time range for which you want to clear the history. Additionally, you can go to the "Privacy" tab in Safari preferences and click on "Manage Website Data" to remove specific website data. If you want to clear the history from other applications, you can go to the application's settings or preferences and look for options to clear history or data. **